Finally i have a 1900 x 905 rendering; There are some wierd artifacts in the moss shaders, as greeny stretched pixels and the time rendering was 59 hours 27 minutes too much. i think i have to decrease this render time! I will begin to disable soft shadows and deferred atmo.

This is a quick test without soft sahdows and defer. atmo enabled, no other settings touched. dou you think that quality is the same?render time: 18 minutes 11 seconds instead of more 2 hours and 33 minutes! Not bad.

It's definitely noisier. But it seems like there's room to find a middle ground given how much of a difference in time there is. So probably don't enable Defer Atmo, but increase Cloud Quality a bit, and try another crop render like this. If the noise is unaffected, you may need to increase atmosphere samples instead.

Changed system for the moss/grass layers, i abandoned my own for @Dandel0 Planetary grass grabbed from his site. I think it's better and don't present wierd artifacts. Maybe i should desaturate and darken a bit the colour of the moss.

The last render, it took 17 hours 43 minutes for the rendering so i think that is the last for the contest. I think that yet could be improved in some parts but anyway it's not enough time. Anyway i want to thank all the people that help me and encourage doing this, and good luck to all fellow contestant, there are so many beautiful picture, it's nice to see how everyone see a different aspect of the Iceland!

You are right. Anyway i learnt a lot doing this, at least i'm a specialist in Terragen's waterfalls. Many ideas have begun to emerge thank to this project, will see a lot of nice stuff! Good luck also to you, Jason!

Yes. the image went slowly but with a lot of progress in, proud of it. Thank's for the nice comment,i hope that i will do even better that this one, i have some ideas that i'm thinking , and I will try to achieve.